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參數(shù)資料
| 型號： | M34C02-LBN6T |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2 Kbit Serial IC Bus EEPROM For DIMM Serial Presence Detect |
| 中文描述： | 2千位串行IC總線的EEPROM內(nèi)存串行存在檢測 |
| 文件頁數(shù)： | 6/19頁 |
| 文件大小： | 147K |
| 代理商： | M34C02-LBN6T |
M34C02
6/19
Figure 5. How to Set the Write Protection
Figure 6. Write Mode Sequences in the Non Write-Protected Area
Default EEPROM memory area
state before write access
to the Protect Register
AI01936C
Standard
Array
FFh
Standard
Array
80h
7Fh
00h
Standard
Array
FFh
Write
Protected
Array
80h
7Fh
00h
State of the EEPROM memory
area after write access
to the Protect Register
Memory
Area
S
S
BYTE WRITE
DEV SEL
BYTE ADDR
DATA IN
S
PAGE WRITE
DEV SEL
BYTE ADDR
DATA IN 1
DATA IN 2
AI01941
S
DATA IN N
ACK
ACK
ACK
R/W
ACK
ACK
ACK
R/W
ACK
ACK
significant bits only) is incremented. The transfer is
terminated by the master generating a STOP
condition.
When the master generates a STOP condition
immediately after the Ack bit (in the “10
th
bit” time
slot), either at the end of a byte write or a page
write, the internal memory write cycle is triggered.
A STOP condition at any other time does not
trigger the internal write cycle.
During the internal write cycle, the SDA input is
disabled internally, and the device does not
respond to any requests.
Minimizing System Delays by Polling On ACK
During the internal write cycle, the memory
disconnects itself from the bus, and copies the
data from its internal latches to the memory cells.
The maximum write time (t
w
) is shown in Table 9,
but the typical time is shorter. To make use of this,
an Ack polling sequence can be used by the
master.
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